Piper Comanche PA-24 Service Manual page 821

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--e
Trouble
Fuel puge foils
'0
Indicaet!'.
Fuel gauge indicates fuU
when tanks arc nor: full.
Fuel puge fails to
change indication when
selector handle
IS
moved
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Fuel
gau~c
mdicates oyer
full.
Fuel gauge indicates
leta
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Fuel gauge indic:ates rue!
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when cell is empty
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INSTRUMENTS
ISSUED:
8/18n2
PIPER COMANCHE SERVICE MANUAL
TABLE XI-XIV, FUEL QUANTITY INDICATORS
Cause
Broken wiring.
G.luge noc operating.
Flou partially or completely
filled with fuel.
Circuit brea.ker au
t.
Dcfe~ive
selectOr switch.
Incomplete ground.
Selector switch slipping on
fuol valve ,hof',
Ddective override switch
Incomplete ground.
Fuel selector in "OFF"
pOSItion.
Shorted connection at selector
switch or other wiring
Fuel ceil
IS
.:oUas~:Jlng
due
to a suction created b~
a loose filler neck cap
When tank is collapsed
fuel sender urn.
IS
held
in full position
3
G18
Remedy
Check and rep1.1f.
Replace,
Replote floor,
Reset and check.
Clean a.nd check selector
switch.
Check grou.nd connections
~t
fuel
tnnSI'Tllttcr
In
wings.
Replace selector switch
Determine which switch is
malfunctioning.
r~liilce
switch.
Check ground connections
a.t
-
fuel .ranstnltter In tucl
cells
Normal.
C~eck
switch and wiring
Refer to SeCtion IX. Elec:·
tric:al Svstem Diagrams
Check fuel c:ell ... nd deter-
mine if It IS coila!,sed
If
so. repair as neceSS.1r\.
adjust filler ca?
to
main-
tain tight sui or
re!,lace
':J.!'
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